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Collaborative spectrum sensing method and device in cognitive radio system

A cooperative spectrum sensing and cognitive radio technology, applied in the field of communication, can solve the problems of reducing CR system capacity, reducing wireless resources, large resource overhead, etc., to achieve the effect of reducing resource overhead, increasing capacity, and improving wireless resources

Active Publication Date: 2014-04-16
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] like figure 1 As shown, it is the transmission method of the centralized cooperative sensing results of the CR system. In the transmission method of the cooperative sensing results of the CR system, since all sensing nodes need to report or interact with sensing results, the general fusion center will allocate (or negotiate between sensing nodes) The wireless transmission resources required for each cooperative sensing node to report / interact the sensing results; when the number of cooperative sensing nodes is large, it will lead to very high resource overhead, which reduces the wireless resources available for service transmission in the CR system and reduces the CR system capacity
[0009] For example, in the centralized cooperative sensing process, there are 4 target spectrums to be sensed by the CR system, and 10 cooperative sensing nodes for each target spectrum. Assuming that the sensing nodes of each target spectrum are different, the total number of sensing nodes in the CR system is 40, the fusion center needs to schedule and allocate the resources required for the transmission of sensing results for 40 sensing nodes. In periodic cooperative spectrum sensing, the CR system needs to schedule and allocate the resources required for the transmission of sensing results for 40 sensing nodes in each sensing cycle. lead to a very large resource overhead

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  • Collaborative spectrum sensing method and device in cognitive radio system
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  • Collaborative spectrum sensing method and device in cognitive radio system

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Embodiment 1

[0023] Embodiment 1 of the present invention provides a cooperative spectrum sensing method in a cognitive radio system (CR system), which can be applied to LTE (Long Term Evolution, long-term evolution) system and TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system, GSM (Global System of Mobilecommunication, global mobile communication) system, WCDMA (Wideband Code Division Multiple Access, wideband code division multiple access) system, CDMA-2000 (Code Division MultipleAccess-2000, broadband code division multiple access 2000) system and WLAN (Wireless Local Area Networks, wireless local area network) and other mobile communication systems. Such as figure 2 As shown, the method includes the following steps:

[0024] Step 201, the sensing node and the sensing result receiving node pre-agreed on the transmission resource and transmission mode of the target spectrum sensing result; the transmission resource and transmission mode of the target spectrum se...

Embodiment 2

[0052]Embodiment 2 of the present invention provides a cooperative spectrum sensing method in a cognitive radio system (CR system), assuming that the fusion center is a base station device (eNode B), the sensing node is a terminal device (UE), and the base station uses the Or criterion for periodic Fusion of collaborative sensing results; the method includes:

[0053] Step A, eNode B and UE pre-agreed on the transmission resource and transmission mode for the target spectrum sensing result; the transmission resource and transmission mode of the target spectrum sensing result are used for all sensing nodes sensing the target spectrum to send local sensing information for the target spectrum result.

[0054] For example, there are M target spectrums to be sensed. First, the eNode B and the UE agree on the transmission resource used for cooperative sensing and reporting of each target spectrum. Assume that the transmission resource agreed for the i-th target spectrum is: the cent...

Embodiment 3

[0068] Based on the same inventive concept as the above method, an embodiment of the present invention also provides a perception node, such as image 3 As shown, the sensing nodes include:

[0069] The agreement unit 11 is used to pre-agree with the sensing result receiving node on the transmission resource and transmission mode of the target spectrum sensing result; The transmission resources and transmission methods of the same target spectrum sensing results are agreed in advance;

[0070] The sending unit 12 is configured to send the local sensing result on the target spectrum to the sensing result receiving node by using the transmission resource and the transmission mode of the target spectrum sensing result.

[0071] In the embodiment of the present invention, the transmission resources of the target spectrum sensing results include: time resources / frequency resources used to transmit the target spectrum sensing results, and the transmission resources of multiple targ...

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Abstract

The invention discloses a collaborative spectrum sensing method and device in a cognitive radio system. The method comprises the steps of appointing transmission resources and a transmission mode of a target spectrum sensing result in advance between sensing nodes and sensing result receiving nodes, and sending a local sensing result on the target spectrum to the sensing result receiving nodes by the sensing nodes by utilizing the transmission resources and the transmission mode of the target spectrum sensing result. According to the method, the pre-appointed transmission resources and transmission mode of the target spectrum sensing result are adopted to transmit the local sensing result on the target spectrum, the phenomenon that a CR system distributes the transmission resources of each target spectrum collaborative sensing result to each sensing node is avoided, therefore, resource expenses in the collaborative spectrum sensing process are reduced, radio resources for service transmission in the CR system are improved, and the capacity of the CR system is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a cooperative spectrum sensing method and device in a cognitive radio system. Background technique [0002] Radio communication spectrum is a precious natural resource. With the rapid development of wireless communication technology, the problem of poor spectrum resources is becoming more and more serious. In order to alleviate the shortage of spectrum resources, the wireless communication spectrum is currently monitored and researched, and some Frequency bands (such as TV frequency bands) are not used most of the time or in most regions, while some frequency bands have multi-system and multi-user competition at the same time, that is, there is an imbalance in the use of spectrum resources . [0003] It is against this background that the concept of CR (Cognitive Radio, Cognitive Radio) was born. Its basic idea is: on the premise of not causing interference to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04B17/00H04B17/382
Inventor 白文岭蒋成钢李媛媛杨宇
Owner DATANG MOBILE COMM EQUIP CO LTD